Viking X-band telemetry experiment

Details Viking X-band telemetry experiment Viking X-band telemetry experiment

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jpl..rept.....w&link_type=abstract

Final Report Jet Propulsion Lab., California Inst. of Tech., Pasadena.

Other

Mariner Jupiter-Saturn Flyby, Superhigh Frequencies, Telemetry, Viking Mars Program, Deep Space Network, Error Analysis, Signal To Noise Ratios, Ultrahigh Frequencies, Weather

Scientific paper

In order to uncover operational and design problems in the use of X-band by the 1977 Mariner Jupiter-Saturn mission and future spacecraft using the Deep Space Network, the Viking X-band telemetry experiment was conducted. The experiment was conducted during the months of December 1975 and January 1976. During each of the five successful passes, a periodic sequence (in lieu of ranging) was transmitted to the spacecraft and returned by the spacecraft transponder on both S- and X-bands. These telemetry-like signals were received, demodulated, and detected. From a variety of measurements at the station, four independent measurements were made of the received signal-to-noise ratio (SNR). These four SNRs were later compared with each other and the predicted SNR. The principal result of the experiment is that X-band telemetry works as expected. That is, the measured SNRs were consistent relative to each other and to the predicted values within the accuracy of the experiment.

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